P. ElefsiniotisD. G. WarehamP. FongsatitukulMahidol UniversityUniversity of Canterbury2018-12-212019-03-142018-12-212019-03-142017-08-31IOP Conference Series: Earth and Environmental Science. Vol.82, No.1 (2017)17551315175513072-s2.0-85029501838https://repository.li.mahidol.ac.th/handle/20.500.14594/42533© Published under licence by IOP Publishing Ltd. This paper compares the practical limits of 2, 4-dichlorophenoxy acetic acid (2,4-D) degradation that can be obtained in two laboratory-scale anaerobic digestion systems; namely, a sequencing batch reactor (SBR) and a single-fed batch reactor (SFBR) system. The comparison involved synthesizing a decade of research conducted by the lead author and drawing summative conclusions about the ability of each system to accommodate industrial-strength concentrations of 2,4-D. In the main, 2 L liquid volume anaerobic SBRs were used with glucose as a supplemental carbon source for both acid-phase and two-phase conditions. Volatile fatty acids however were used as a supplemental carbon source for the methanogenic SBRs. The anaerobic SBRs were operated at an hydraulic retention time of 48 hours, while being subjected to increasing concentrations of 2,4-D. The SBRs were able to degrade between 130 and 180 mg/L of 2,4-D depending upon whether they were operated in the acid-phase or two-phase regime. The methanogenic-only phase did not achieve 2,4-D degradation however this was primarily attributed to difficulties with obtaining a sufficiently long SRT. For the two-phase SFBR system, 3.5 L liquid-volume digesters were used and no difficulty was experienced with degrading 100 % of the 2,4-D concentration applied (300 mg/L).Mahidol UniversityEarth and Planetary SciencesEnvironmental ScienceConference PaperSCOPUS10.1088/1755-1315/82/1/012004